U007A
Control Module Communication Bus H Off
U007A is an OBD-II diagnostic trouble code meaning: Control Module Communication Bus H Off. Common causes: open or short circuit in can bus wiring, poor contact in connectors. Estimated repair cost: $6–56.
Symptoms
- Check Engine Light Is On
- Disabling individual vehicle systems
- Incorrect instrument readings
- Problems starting the engine
- Errors in other systems
Causes
- Open or short circuit in CAN bus wiring
- Poor contact in connectors
- Malfunction of one of the control modules
- Problems with module power supply
- Damage to CAN bus terminators
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean all connectors
- Check power supply and grounding of modules
- Disable the modules one by one to find the faulty one.
- Check the resistance of the CAN bus terminators
Related codes
Error U007A by Vehicle Brand
FAQ
What does the U007A code mean?
U007A is an OBD-II diagnostic trouble code that indicates: Control Module Communication Bus H Off
What causes a U007A error code?
The most common causes of U007A include: Open or short circuit in CAN bus wiring; Poor contact in connectors; Malfunction of one of the control modules; Problems with module power supply.
How do I fix a U007A diagnostic trouble code?
To fix U007A: Check the integrity of the CAN bus wiring. Inspect and clean all connectors. Check power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U007A?
Do not drive — repair immediately
How much does it cost to fix U007A?
The estimated repair cost for U007A is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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